If you have a DatGrid and you want to display row specific data on mouseOver, here is how this can be done.

The first step is to enable showDataTips property for every DataGridColumn that you want to enable this functionality on.
Secondly, you need to have a dataTipFunction function on the DatGrid itself. Because dataTipFunction passes over the Grid row data as an Object to the calling function, you dont need to pass any arguments to it. Here is a little example that shows how to do it.

Thanks a lot but i have a different problem.
dataTipFunction is called when grid is populated. What if we need to show tooltip on MouseOver? I mean what if data to be shown is available on MouseOver and not when populating the grid?